EP0441524B1 - Composition de revêtement photoréticulable et photoinsolubilisable contenant des groupes halométhyle-1,3,5-triazine - Google Patents

Composition de revêtement photoréticulable et photoinsolubilisable contenant des groupes halométhyle-1,3,5-triazine Download PDF

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EP0441524B1
EP0441524B1 EP91300706A EP91300706A EP0441524B1 EP 0441524 B1 EP0441524 B1 EP 0441524B1 EP 91300706 A EP91300706 A EP 91300706A EP 91300706 A EP91300706 A EP 91300706A EP 0441524 B1 EP0441524 B1 EP 0441524B1
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group
composition according
polymer
groups
coating composition
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EP0441524A3 (fr
EP0441524A2 (fr
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James A. C/O Minnesota Mining And Bonham
Mitchell A. C/O Minnesota Mining And Rossman
Richard J. C/O Minnesota Mining And Grant
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3M Co
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Minnesota Mining and Manufacturing Co
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/004—Photosensitive materials
    • G03F7/04—Chromates
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/004—Photosensitive materials
    • G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
    • G03F7/0388—Macromolecular compounds which are rendered insoluble or differentially wettable with ethylenic or acetylenic bands in the side chains of the photopolymer
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/004—Photosensitive materials
    • G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
    • G03F7/028—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with photosensitivity-increasing substances, e.g. photoinitiators
    • G03F7/029—Inorganic compounds; Onium compounds; Organic compounds having hetero atoms other than oxygen, nitrogen or sulfur
    • G03F7/0295—Photolytic halogen compounds
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/004—Photosensitive materials
    • G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S522/00—Synthetic resins or natural rubbers -- part of the class 520 series
    • Y10S522/904—Monomer or polymer contains initiating group

Definitions

  • the present invention relates to photosensitive compounds, more particularly polymers containing halomethyl-1,3,5-triazine moieties and to radiation-sensitive compositions and elements utilizing these polymers.
  • Halomethyl-1,3,5-triazines are known to be initiators for a number of photochemical reactions. They are employed to produce free radicals for initiating polymerization or color changes and for initiating secondary reactions upon liberation of acid by the interaction of free-radicals when hydrogen donors are present.
  • U.S. Patent No. 3,779,778 discloses the photoinitiated acid catalyzed decomposition of pyranyl ether derivatives to produce photosolubilizable compositions useful as positive printing plates. Chromophore substituted styryl-1,3,5-triazines and their uses are disclosed in U.S. Patent No. 3,987,037 and U.S. Patent No. 3,954,475.
  • This invention provides a photocrosslinkable photoinsolubilizable coating composition
  • These polymers have a photo-labile halomethyl-1,3,5-triazine moiety and a polymeric moiety within the same molecule.
  • the compounds of this invention are comprised of a polymeric moiety having attached or incorporated within its structure at least one 1,3,5-triazine nucleus, said triazine nucleus having at least one halomethyl substituent attached to a carbon atom of the triazine nucleus according to formula (I) of claim 1.
  • These compounds are capable of being stimulated by actinic radiation at wavelengths of from about 250 to about 900 nanometers to generate free radicals and/or acids.
  • the polymers exhibit the capability to crosslink upon exposure to light.
  • the compositions are useful in elements used in printing, duplicating, copying, photography, and other imaging systems as well as in photocurable coatings such as ultraviolet curable printing inks, protective coatings, release liners, photoresists, and the like.
  • polymeric moiety and “polymer” refer to macromolecules having molecular weights ranging from about several thousand to about several million that have been derived by the linking together of large numbers, e.g., tens, hundreds, thousands, or more, of smaller molecules.
  • the smaller molecules that combine with each other are commonly referred to as “monomers” or “prepolymers”, and the reactions by which they combine are commonly referred to as “polymerizations”.
  • Polymers are illustrated schematically by using the appropriate structural repeating unit or units, which, in many instances, are schematic illustrations of the monomer or prepolymer starting materials.
  • polymer includes both homopolymers, i.e., polymers wherein all monomeric units are identical, and copolymers, i.e., polymers wherein more than one type of monomeric unit is present.
  • halomethyl-1,3,5-triazine moiety means a 1,3,5-triazine having substituted on at least one of the carbon atoms of the triazine ring at least one member selected from the above specified mono-, di-, and trihalomethyl groups.
  • halomethyl -1,3,5-triazine moieties of the polymers present in the composition of claim 1 can be represented by the general formula (I) (see claim 1).
  • a groups that are suitable for the present invention are chloro-, bromo-, and iodomethyl groups, with chloro- and bromomethyl groups being preferred.
  • Trihalomethyl groups (with the above group) are preferred; trichloromethyl and tribromomethyl groups are most preferred.
  • R or R' represents an alkyl group, it is preferred that it have one to twelve carbon atoms, preferably one to six carbon atoms.
  • R or R' represents a substituted or unsubstituted aryl group
  • the group have no more than five fused rings, more preferably no more than three fused rings, such as, for example, phenyl, naphthyl, anthracenyl.
  • suitable substituents include, but are not limited to, halogen atoms; alkyl groups, preferably having one to twelve carbon atoms; aryl groups; alkoxy groups; aryloxy groups; alkylthio groups; amino groups, carboxylic acid groups and their esters; acyl groups; acyl amino groups; nitro groups; and sulfonic acid groups.
  • substituents can include not only the substituents that are suitable for R when R represents an aryl group, but also a substituted alkenyl or polyalkenyl group, preferably having one to six conjugated carbon-to-carbon double bonds, more preferably one to two conjugated carbon-to-carbon double bonds, and substituted with an aryl or heteroaromatic group (such as phenyl, 4-methoxy-1-naphthyl, 2-benzothiazole); a substituted alkynyl group, preferably having one to three conjugated carbon-to-carbon triple bonds, more preferably one ethynyl group, and substituted with an aryl or heteroaromatic group (such as phenyl, 2-thienyl).
  • R' represents a heteroaromatic group
  • the group contain a maximum of three fused rings. It is preferred that the heteroatoms be selected from the group consisting of nitrogen, oxygen, sulfur, and combinations thereof.
  • heteroaromatic groups useful as R' include, but are not limited to, those derived from a furan group, a thiophene group, a pyrrole group, a pyridine group, an oxazole group, an isooxazole group, a thiazole group, an imidazole group, a benzofuran group, a benzothiophene group, a benzimidazole group, a benzotriazole group, a quinoline group, a benzoxazole group, and a benzothiazole group.
  • Other examples of heteroaromatic groups substituted on halomethyl-1,3,5-triazines are recited in U.S. Patent No. 3,987,037 and U.S. Patent No. 4,772,
  • R' represents a substituted alkenyl or polyalkenyl group
  • the group have one to six conjugated carbon-to-carbon double bonds, more preferably one to three conjugated carbon-to-carbon double bonds, and substituted with an aryl or heteroaromatic group (such as styryl, 2-benzoxazole).
  • R' represents a substituted alkynyl group
  • the group have one to three conjugated carbon-to-carbon triple bonds, more preferably one ethynyl group, and substituted with an aryl or heteroaromatic group (such as phenyl, 2-pyridyl).
  • heteroaromatic groups When R' is substituted with a heteroaromatic group, these heteroaromatic groups can be the same as those previously described herein.
  • R or R' represents an alkyl group, aryl group, or heteroaromatic group
  • the particular identity of R and R' and their substituents, if any, is not critical.
  • Certain groups may be selected to impart or modify a physical property of the polymers of this invention, such as solubility, softness, or hardness.
  • R' and its substituents can be selected to impart a certain spectral response to the triazine moiety within the polymers of this invention, based on their intended use. However, the substituents should not adversely affect the desired light sensitivity of the polymers of the invention.
  • L represents a group that links the triazine nucleus to the polymeric moiety as defined in claim 1.
  • the precise identity of L is not critical, but it should be selected so that it does not interfere with or adversely affect the light sensitivity of the compound.
  • L can be formed from a single group or it can be formed from a combination of groups.
  • L can also be a covalent bond.
  • Groups that are suitable for linking groups include carbamato (-NHCO 2 -), urea (-NHCONH-), amino (-NH-), amido (-CONH-), aliphatic, e.g., having up to 10 carbon atoms, alkyl, e.g., having up to 10 carbon atoms, haloalkyl, e.g., having up to 10 carbon atoms, alkenyl, e.g., having up to 10 carbon atoms, aryl, e.g., having one ring. styryl, ester (-CO 2 -), ether (-O-), and combinations thereof. Bpsed on ease of synthesis, groups that can be attached directly to the triazine nucleus are amino, alkenyl, aryl, ester, and ether.
  • L can be selected to contain a reactive group or polymerizable group that will be useful in polymerization reactions to prepare polymers containing halomethyl-1,3,5-triazine -triazine moieties.
  • Typical reactive groups contained in L and useful in polymerization reactions include, but are not limited to, hydroxyls; isocyanates; amines; carboxylic acids; vinyl monomers such as acrylates, methacrylates, vinyl esters, acrylamides, methacrylamides, and styrenes; vinyl ethers; and cyclic ethers.
  • L can be selected to contain a reactive group that can combine with a functional group attached to a preformed polymer. Examples of such reactive groups include, but are not limited to, isocyanates, hydroxyls, amines, carboxylic acids, anhydrides, and epoxides.
  • the common polymers can be modified to contain a halomethyl-1,3,5-triazine moiety attached to or incorporated within the backbone thereof.
  • the common polymers include, but are not limited to, polyamides, polyesters, polyurethanes, polysiloxanes, phenolic resins, poly(aryl methylenes), polystyrenes, poly(acrylic esters), poly(acrylic acids), polyacrylamides, polyacrylonitrile, polyethylenes, polybutadienes, polyvinyl esters, polyvinyl alcohol, polyvinyl acetals, polyvinyl ethers, polyvinyl pyrrolidone, polyvinyl pyridine, polyvinyl chloride, polyethylene oxides, polypropylene oxides, polyethylene glycols, polypropylene glycols, polyethyleneimines, epoxide resins, phenoxy resins, polytetrahydrofuran, polycaprolactone, poly
  • polymers containing halomethyl-1,3,5-triazine moieties of this invention can be prepared is by the reaction of a triazine with a polymer having a functional group which will combine with a reactive group of the triazine.
  • Another method for preparing polymers having halomethyl-1,3,5-triazine moieties from existing polymers is to react hydroxyl-substituted halomethyl-1,3,5-triazines with polymers having groups that are reactive with the hydroxyl group.
  • groups include, but are not limited to, isocyanates, epoxides, anhydrides, oxazolinones, and acid chlorides.
  • Typical polymers that contain some of these groups include 2-isocyanatoethyl methacrylate copolymers, isocyanate terminated oligomers of polyols and polyesters, styrene-maleic anhydride copolymers, vinyl ether-maleic anhydride copolymers, and vinyl oxazolinone copolymers.
  • Halomethyl-1,3,5-triazines suitable for this reaction include:
  • a class of polymers particularly preferred for this invention are acrylic and acrylamide polymers, for the reasons that they are structurally versatile, easy to synthesize, have good physical properties, and provide good performance. While they can be prepared as discussed previously, another convenient method that can be used to prepare these materials is the free radical polymerization of halomethyl-1,3,5-triazines having an attached acrylate, methacrylate, acrylamide, methacrylamide, or styrene monomer moiety. Representative examples of these monomer substituted triazine compounds are listed in Table I.
  • halomethyl groups suitable for the compounds of this invention are to be limited to -CCl 3 .
  • Comonomers useful in the copolymerization reaction with monomer substituted halomethyl-1,3,5-triazines include, but are not limited to, acrylic and methacrylic acid; acrylic and methacrylic esters, such as methyl, ethyl, butyl, octyl, 2-dimethylaminoethyl, 2-methoxyethyl, 2-hydroxyethyl, 2-chloroethyl, benzyl, glycidyl, 2-cyanoethyl, tetrahydrofurfural; acrylamide and its derivatives, such as N-methylolacrylamide, N-isobutoxymethylacrylamide, and methacrylamide; styrene, maleic anhydride, 4-vinyl pyridine, 2-methacryloyloxyethane-1-sulfonic acid and its salts, acrylonitrile, vinyl ethers such as ethyl vinyl ether.
  • Acrylic and acrylamide monomers can
  • polyurethanes which are normally formed from a diol, diisocyanate, and a chain extender.
  • Halomethyl-1,3,5-triazine derivatives having either dihydroxyl or diisocyanate groups are particularly useful reactants.
  • the dihydroxyl derivatives may be used directly or converted to a diisocyanate prepolymer by reaction with a diisocyanate such as tolylene-2,4-diisocyanate.
  • diisocyanate such as tolylene-2,4-diisocyanate.
  • Other diols such as hydroxyl terminated linear aliphatic polyesters and aliphatic polyethers as well as other aromatic, aliphatic, cycloaliphatic or polycyclic diisocyanates can be used in conjunction with them.
  • Suitable dihydroxyl or diisocyanato substituted halomethyl-1,3,5-triazines that can be employed in the preparation of polyurethanes include:
  • halomethyl-1,3,5-triazine content of the polymers of the present invention can theoretically range from about 0.01% to 90% on a molar basis. On a practical basis, however, the lower limit is approximately 0.10% and the upper limit is approximately 70% on a molar basis. Thus, considerable latitude is possible in achieving an halomethyl-1,3,5-triazine content of a polymer to fit the requirements of a particular application. For example, whenever it is desirable to keep the amount of polymer concentration low in a photosensitive composition yet still provide an effective amount of the photoinitiator, then a higher content, e.g., 25 to 70 mole percent, of halomethyl-1,3,5-triazine within the polymer may be preferred.
  • the photosensitive composition is largely comprised of the polymers of this invention, then it may be more desirable to have the halomethyl-1,3,5-triazine content in the lower ranges, e.g., from 0.5 to 20 mole percent.
  • the polymers of this invention can also exhibit a wide range of molecular weights, solubilities, hardness, tear strength, modulus, elongation, adhesion, clarity, etc. The importance of these various characteristics will largely depend on the particular application for which the material will be used. Because the polymers having halomethyl-1,3,5-triazine moieties will function as light sensitive materials even at low concentrations of the halomethyl-1,3,5-triazine moiety, the predominate physical properties of the backbone polymer will be largely retained. Therefore, the design of the polymer having the halomethyl-1,3,5-triazine moiety can utilize existing polymer technology to achieve gross properties.
  • the molecular weight of the polymers of this invention can vary from 1,000 to 1,000,000 or greater.
  • the molecular weight preferably ranges from 5,000 to 1,000,000.
  • Polymers having halomethyl-1,3,5-triazine moieties that are soluble or dispersible in a wide range of common solvents can be prepared.
  • Such common solvents include hydrocarbons, chlorinated hydrocarbons, aromatics, ketones, esters, alcohols, water, and combinations thereof.
  • the solubility or dispersibility is a function of the chemical nature of either the substituents or segments within the polymer.
  • Various solubilizing or dispersing groups can be employed, especially in applications where a solubility or dispersibility in water is desired.
  • Ionic substituents such as alkyl and aryl carboxylic acids, sulfonic acids, phosphonic acid, phenols, and their salts, as well as aryl and alkyl amines, such as pyridine and piperidine, and quaternary salts of alkyl and aryl amines, are particularly useful in promoting solubility or dispersibility in water.
  • Polymers or copolymers of this invention that contain segments that are useful for promoting solubility or dispersibility in water can be derived from water-soluble monomers, such as, for example, ethylene oxide, vinyl pyrrolidone, vinyl alcohol, acrylamide, vinyl ethers, and ethylene imine.
  • the polymers of this invention are particularly useful for preparing photosensitive compositions.
  • a halomethyl-1,3,5-triazine moiety function as a photoinitiator, such as free radical photopolymerization reactions, oxidation-reduction reactions, or reactions sensitive to acid
  • the polymers ca: be used to provide the halomethyl-1,3,5-triazine photoinitiator.
  • a major advantage of these polymers as photoinitiators is the reduction of undesirable initiator migration, especially within multilayer compositions. Migration typically occurs in photopolymerizable compositions containing low molecular weight monomers and plasticizers, which tend to diffuse between layers, carrying along other ingredients such as the photoinitiator.
  • the polymers of this invention are less susceptible to migration on account of the anchoring or ballasting of the halomethyl-1,3,5-triazine.
  • the polymers of this invention can be used to prepare compositions that will photocrosslink upon exposure to actinic radiation. Compositions comprising these halomethyl-1,3,5-triazine polymers can be applied very simply from a solution.
  • compositions of this type typically comprise an unsaturated, free radical initiated, chain propagating addition polymerizable compound, a polymer of this invention and, optionally, one or more fillers, binders, dyes, polymerization inhibitors, color precursors, oxygen scavengers, etc.
  • the compound of this invention should be present in an amount sufficient to effect polymerization of the polymerizable compound.
  • Another advantage of the polymer of this invention is that the addition of a separate polymeric binder is not necessary, thereby simplifying the formulation and minimizing compatibility problems.
  • halomethyl-1,3,5-triazine moiety content in that particular polymer.
  • the halomethyl-1,3,5-triazine moiety represents 0.5 to15%, preferably 1 to 7.5%, of the total polymerizable composition.
  • the polymers of this invention can also be used advantageously as the primary component in simple photocrosslinkable compositions.
  • Other advantages with respect to free radical photopolymerizable compositions containing low molecular weight monomers include the elimination of the monomer itself. The presence of monomers is environmentally undesirable and leads to other problems such as tacky coatings, migration, oxygen inhibition, and major physical property changes upon exposure due to high crosslinking densities.
  • compositions of this type typically comprise a polymer of this invention, and optionally, one or more fillers, dyes, pigments, plasticizers, and other additives. Upon exposure to actinic radiation, these polymers will undergo crosslinking, which renders them insoluble.
  • the crosslinking reaction is very efficient and can occur with as low as 0.5% by weight of the halomethyl-1,3,5-triazine moiety present in a given polymer.
  • the preferred weight range of the halomethyl-1,3,5-triazine moiety is from 1 to 20%.
  • crosslinking reaction is believed to result from the photodecomposition of the halomethyl-1,3,5-triazine moiety to create free radicals. These free radicals can either combine between polymers or abstract hydrogens to create other sites on the polymer which will then combine. Crosslinking efficiency appears to be enhanced by the presence of abstractable hydrogen atoms within the polymer.
  • halomethyl-1,3,5-triazine moiety is sufficient to cause the photocrosslinking reaction of the polymers of this invention
  • other compounds capable of participating in crosslinking either directly or by free radical or acid induced reactions, can be added to the composition, if desired.
  • substituents be covalently attached to the polymers of the invention to assist crosslinking instead of adding such other materials.
  • substituents include acrylate and methacrylate groups, acrylamide groups, and vinyl ethers, among others. The number of these groups can vary but typically range from 1 to 20% by weight of the polymer.
  • Unsaturated, free-radical initiated, chainpropagating addition polymerizable compounds suitable for use with the compound of this invention include alkylene or polyalkylene glycol diacrylates, e.g., ethylene glycol diacrylate, diethylene glycol diacrylate, glycerol diacrylate, glycerol triacrylate, ethylene glycol dimethacrylate, 1,3-propanediol dimethacrylate, 1,2,4-butanetriol trimethacrylate, 1,4-cyclohexanediol diacrylate, pentaerythritol tetramethacrylate, pentaerythritol triacrylate, sorbitol hexaacrylate; bis[1-(3-acryloxy-2-hydroxy)]-p-propoxyphenyl dimethylmethane, bis[1-(2-acryloxy)]-p-ethoxyphenyl-dimethylmethane, tris hydroxyethyl-isocyanurate
  • the preferred unsaturated compounds include pentaerythritol tetraacrylate, bis[p-(3-acryloxy-2-hydroxypropoxy)phenyl]-dimethylmethane, and bis[p-(2-acryloxyethoxy)phenyl]-dimethylmethane.
  • Mixtures of these esters can also be used as can mixtures of these esters with alkyl esters of acrylic acid and methacrylic acid, including such esters as methyl acrylate, methyl methacrylate, ethyl acrylate, isopropyl methacrylate, n-hexyl acrylate, stearyl acrylate, allylacrylate, styrene, diallyl phthalate, and the like.
  • polymerizable moieties of the foregoing types can form a part of a substituent on the polymeric backbone along with the halomethyl-1,3,5-triazine moiety to enhance crosslinking.
  • compositions containing the compounds of this invention to actinic radiation of a particular wavelength range can be increased by the incorporation of known ultraviolet and visible light sensitizers including cyanine, carbocyanine, merocyanine, styryl, acridine, polycyclic aromatic hydrocarbons, polyarylamines, and amino-substituted chalcones.
  • Cyanine dyes suitable for this invention are described in U.S. Patent No. 3,495,987.
  • Styryl dyes and polyarylamines suitable for this invention are described in J. Kosar, Light Sensitive Systems, J. Wiley & Sons (New York:1965), pp. 361-369.
  • Polycyclic aromatic hydrocarbons useful as sensitizers are disclosed in U.S. Patent No. 3,640,718, an example of which is 2-ethyl-9,10-dimethoxyanthracene.
  • Amino substituted chalcones useful as sensitizers are described in U.S. Patent No. 3,617,288.
  • the compounds of this invention can be used in photosensitive compositions in combination with other photoinitiators including benzophenones, benzoin ethers, thioxanthone, benzil, and Michler's ketone.
  • the compounds of this invention can also be substituted for the triazines used in conjunction with dialkylamimo aromatic carbonyl compounds, as disclosed in U.S. Patent No. 4,259,432, with 2-(benzoylmethylene)-5-benzothiazolidene thiazole-4-1 compounds, as disclosed in E application 0109291, May 23, 1984; with three keto-substituted coumarin compounds, as disclosed in U.S. Patent No. 4,505,793, as well as those described in U.S. Patent No. 4,239,850, Jpn. Kokai Tokyo Koho JP 60 60,104 (85 60104), and Ger. Offen. 2,851,641.
  • Photosensitive elements can be made by coating a photosensitive composition on a suitable base or support and drying the coating.
  • the dry thickness typically ranges from 0013mm to 1.9mm (0.00005 to 0.075 in).
  • Suitable bases or supports for the photosensitive compositions include metals, e.g., steel and aluminum plates, sheets and foils, and films or plates composed of various film-forming synthetic or high polymers including addition polymers, e.g., vinylidene chloride, vinyl chloride, vinyl acetate, styrene, isobutylene polymers and copolymers; linear condensation polymers, e.g., polyethylene terephthalate, polyhexamethylene adipate, polyhexamethylene adipamide/adipate.
  • addition polymers e.g., vinylidene chloride, vinyl chloride, vinyl acetate, styrene, isobutylene polymers and copolymers
  • linear condensation polymers e.g., polyethylene terephthalate, polyhexamethylene adipate, polyhexamethylene adipamide/adipate.
  • Examples 1and 2 illustrate the preparation of polymers having pendent halomethyl-1,3,5-triazine moieties from polymers having reactive groups, in particular, azlactone and maleic anhydride groups.
  • This example illustrates the preparation of polymer-substituted halomethyl-1,3,5-triazine by means of an addition reaction.
  • Di-n-butyltin dilaurate 0.3 g in 3 ml of toluene
  • the infrared spectrum of a product was consistent with the formation of a TDI end-capped polybutadiene.
  • the resulting solution had a solids content of 76.8%.
  • a solution was prepared using 2.0 g of the 47% solution containing the product of this example, 2.0 g of toluene, and 1.0 g of a dispersion ("Penn Color Dispersion 29S358", Penn Color Inc.) containing 8% phthalo blue pigment (CAS #147-14-8), 8% acrylic resin, 42% toluene, and 42% methyl ethyl ketone.
  • the resulting solution was coated onto anodized aluminum by means of a #9 wire wound rod and dried at 65°C for 45 seconds to produce a slightly tacky coating.
  • a polyester film was laminated to the coating and the resulting composite exposed in a Berkey Ascor 30 in. X 40 in.
  • Examples 5-6 illustrate the preparation of polyurethane and silicone polymers having a halomethyl-1,3,5-triazine moiety incorporated either in a pendent position or within the polymer backbone.
  • the polymers were prepared by isocyanate addition reactions.
  • This example is the reaction of 2-isocyanatoethyl methacrylate with 2,4-bis(trichloromethyl)-6-[p-(2-hydroxyethoxy)styryl]-1,3,5-triazine to prepare the carbamate derivative referenced herein as MOSTOLIEM.
  • the clear residue was dissolved in a small amount of dichloromethane and loaded upon a silica gel column (100 g packed in a 50% dichloromethane/50% hexane solvent mixture) and eluted with dichloromethane.
  • the major product was collected, the appropriate fractions were pooled, and the solvent was removed at room temperature by means of a rotary evaporator to yield the product.
  • the product had a melting point of 66-69°C and ⁇ max of 235 nm (in methanol).
  • the structural formula of the product is as follows:
  • Example 19 The procedure of Example 19 was repeated with the exception that 2-isocyanato-4-(p-methoxyphenyl)-6-trichloromethyl-1,3,5-triazine was used.
  • the product had a melting point of 131-133°C and a ⁇ max of 308 nm (in methylene chloride).
  • the structural formula of the product is as follows:
  • a series of copolymers was prepared using methyl methacrylate and the triazine monomer of Preparation 1 in the weight ratios of 50/50 and 20/80, respectively, using the following procedure.
  • the comonomers (10 g total) were dissolved in 23 g of methyl ethyl ketone containing 0.04 g of azobisisobutyronitrile.
  • the solutions were purged with nitrogen for four minutes, the containers sealed, and the solutions agitated in a water bath at 60°C for 24 hours.
  • the viscosity of the solution had increased and infrared analysis was consistent with polymer formation.
  • the general structural formula is the same as that of the polymer of Example 23, except that the ratios are 0.5/0.5 and 0.8/0.2.
  • a series of polymers and copolymers were prepared according to the procedure described below.
  • the monomeric components of these polymers and copolymers are listed in Table II.
  • the comonomers (10 g total) were dissolved in 23 g of ethyl acetate containing .040 g of azobisisobutyronitrile.
  • the solutions were purged with nitrogen for four minutes, the containers sealed, placed in a water bath, and agitated at 55°C. Reaction time was 20 hours for sample nos. 22-1 to 22-5 and six hours for sample nos. 22-6 to 22-9.
  • the resulting polymeric solutions were diluted with another 33 g of ethyl acetate, except for sample nos.
  • Examples 12-14 illustrate the capability of polymers of this invention to undergo light induced crosslinking reactions and to become insoluble.
  • This example illustrates that polymers containing the halomethyl-1,3,5-triazine moiety within the polymer structure become crosslinked and insoluble when exposed to actinic radiation. It also illustrates the light induced crosslinking of a series of acrylic copolymers of the invention compared with physical mixtures of similar copolymers and halomethyl-1,3,5-triazines.
  • a series of coating solutions was prepared using 6.0 g of the 16.5% polymer solutions of Example 25 by adding 0.875 g of a dispersion ("Penn Color Dispersion 29S358", Penn Color Inc.) containing 8% phthalo blue pigment (CAS #147-14-8), 8% acrylic resin, 42% toluene, and 42% methyl ethyl ketone.
  • the halomethyl-1,3,5-triazine MOSTOLIEM of was added to those polymers not having been copolymerized with this monomer.
  • Each of the coating compositions was coated on grained anodized aluminum by means of a wire wound rod and dried at 65°C for 45 seconds. Coating weights of 140-180 mg/sq. ft. were obtained.
  • control sample no. 23-1 which was a physical mixture of 95 parts of an 80/20 methyl methacrylate/acrylic acid copolymer with five parts of added MOSTOLIEM, did not crosslink upon exposure to provide an image.
  • sample no. 23-2 which consisted of 75/20/5 methyl methacrylate/acrylic acid/MOSTOLIEM copolymer exhibited excellent crosslinking and resistance to solvent and gave seven image steps on the gray scale.
  • This example illustrates the effectiveness of photoinitiated crosslinking at low concentrations of halomethyl-1,3,5-triazine in a series of acrylic copolymers.
  • a series of six copolymers containing decreasing amounts of a halomethyl-1,3,5-triazine moiety were prepared from methyl methacrylate/acrylic acid/MOSTOLIEM using the procedure of Example 11. The ratios of each component are shown in Table IV. The polymers were dissolved in ethyl acetate and the resulting solutions were adjusted to a concentration of 15%. Separate coating compositions were prepared from 6.0 g of the polymeric solution, and 0.80 g of a pigment dispersion containing 7.5% phthalo blue pigment and 1.5% "Elvacite AB 1015" dispersant (E.I. duPont de Nemours and Company) in methyl ethyl ketone.
  • the solutions were coated onto grained and anodized aluminum by means of a wire wound rod and dried at 65°C for 45 seconds to qive dry coating weights of approximately 0.15mg/cm 2 (140mg/sq. ft). These coatings were then exposed for 20 seconds in a five kw Berkey 76,2cmx101,6cm (30in.x40in.) vacuum frame using a lithographic negative and a Stouffer 21 step ⁇ 2 gray scale negative.
  • the plates were developed using either ethyl acetate (Developer A) or an aqueous solution of 3.5% benzyl alcohol and 2.1% sodium alkyl naphthalene sulfonate surfactant (Developer B).
  • This example illustrates the effect of oxygen on the photoinitiated crosslinking of polymers containing halomethyl-1,3,5-triazine moieties.
  • terpolymers Three terpolymers were prepared from methyl methacrylate (MMA), 2-dimethylaminoethyl methacrylate(DMAEMA), and MOSTOLIEM (the product of Preparation 1) according to the procedure of Example 11 with the exception that the reaction temperature was 60°C and the reaction time was 17 hours. Coating solutions were prepared from these three terpolymers and coated onto anodized aluminum according to the same procedure described in Example 13. Exposure and processing was also conducted according to Example 13 except that one set was conducted in vacuum (reduced oxygen) and another set was conducted without vacuum. Sample no.
  • MMA methyl methacrylate
  • DMAEMA 2-dimethylaminoethyl methacrylate
  • MOSTOLIEM the product of Preparation 1
  • Examples 15-16 illustrate the preparation of copolymers containing a halomethyl-1,3,5-triazine moiety and an unsaturated vinyl moiety suitable for free radical chain polymerization.
  • a solution of 8.5 g of methyl methacrylate, 1.0 g of 2-hydroxyethyl methacrylate, 0.5 g of the MOSTOLIEM monomer from Preparation 1, and 0.10 g of azobisisobutyronitrile in 40 ml of ethyl acetate in a narrow mouth bottle was purged for three minutes with nitrogen, and the bottle was then sealed.
  • the sealed bottle was placed in a water bath at 60°C and agitated for 17 hours to provide a viscous solution.
  • a copolymer was prepared according to the procedure of Example 15 using 1.0 g of 2-vinyl-4,4-dimethyl-2-oxazolin-5-one and 9.0 g of methyl methacrylate. To the resulting viscous solution was added 1.73 g of 2,4-bis(trichloromethyl)-6-[p-(2-hydroxyethoxy)styryl]-1,3,5-triazine, 0.469 g of 2-hydroxyethyl methacrylate, and 0.045 g of ethane sulfonic acid. The resulting solution was heated at 55°C for another 18 hours. Infrared analysis of the product showed the disappearance of the azlactone group and was consistent with the desired product.
  • Example 17 illustrates the use of polymers having halomethyl-1,3,5-triazine -triazine moieties as photoinitiators for the free radical polymerization of compositions containing vinyl monomer.
  • the MOSTOLIEM monomer of Preparation 1 was prepared by means of the procedure of Example 13. The amount of polymeric initiator in each of the samples was adjusted as necessary to provide an amount of trichloromethyl-1,3,5-triazine moiety (MOSTOL) equivalent to that used in the control sample no. 30-1.
  • MOSTOL trichloromethyl-1,3,5-triazine moiety
  • the photopolymerizable compositions were coated onto anodized aluminum plates by means of a #12 wire wound rod, and dried at 65°C for 45 seconds to provide a light sensitive coating having a coating weight of 130-145 mg/sq. ft. These plates were exposed to a five kw lamp using a Berkey(30 in.

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Claims (21)

  1. Composition de revêtement photoréticulable et photo-insolubilisable, comprenant un polymère susceptible d'être dissous ou dispersé dans un solvant et susceptible d'être rendu insoluble dans ledit solvant lorsqu'il est déposé sur un support et irradié par un rayonnement actinique, audit polymère étant lié de façon covalente au moins un noyau 1,3,5-triazine de formule :
    Figure 00540001
    dans laquelle :
    A représente un élément choisi dans l'ensemble constitué par les groupes mono-, di- et trichlorométhyle, les groupes di- et tribromométhyle, et les groupes mono-, di- et triiodométhyle,
    Y représente un élément choisi dans l'ensemble constitué par -A-, -L-, -NH2, -NHR, -NR2, -OR et -R', où chaque R représente indépendamment un élément choisi dans l'ensemble constitué par les groupes alkyle et les groupes aryle, et R' représente un élément choisi dans l'ensemble constitué par les groupes alkyle, les groupes aryle, les groupes alcényle, les groupes polyalcényle et les groupes hétéroaromatiques, et
    L représente un groupe ou une liaison covalente reliant le cycle triazine au polymère, la partie de L directement attachée au noyau triazine étant choisie dans l'ensemble constitué par (a) un groupe aryle, (b) un groupe alcényle, (c) un groupe ester, (d) un groupe amino et (e) un atome d'oxygène.
  2. Composition de revêtement selon la revendication 1, dans laquelle ledit noyau triazine au nombre d'au moins un est attaché à ladite charpente polymère sous la forme d'un groupe terminal.
  3. Composition de revêtement selon la revendication 1, dans laquelle ledit noyau triazine au nombre d'au moins un est attaché à ladite charpente polymère sous la forme d'un groupe pendant.
  4. Composition de revêtement selon la revendication 1, dans laquelle ledit noyau triazine au nombre d'au moins un est incorporé à l'intérieur de la charpente du polymère.
  5. Composition de revêtement selon l'une quelconque des revendications 1 à 4, dans laquelle ledit polymère a une masse moléculaire supérieure à mille.
  6. Composition de revêtement selon la revendication 5, dans laquelle ledit polymère a une masse moléculaire située dans la plage allant de 5 000 à un million.
  7. Composition de revêtement selon l'une quelconque des revendications 1 à 6, dans laquelle le pourcentage en poids de noyaux 1,3,5-triazine présents dans le polymère est situé dans la plage allant de 0,01 % en moles à 90 % en moles.
  8. Composition de revêtement selon la revendication 7, dans laquelle le pourcentage en poids de noyaux 1,3,5-triazine présents dans le polymère est situé dans la plage allant de 0,10 % en moles à 70 % en moles.
  9. Composition de revêtement selon l'une quelconque des revendications 1 à 8, dans laquelle A représente un groupe trichlorométhyle ou tribromométhyle.
  10. Composition de revêtement selon l'une quelconque des revendications 1 à 9, dans laquelle Y représente un élément choisi parmi les groupes aryle à substitution alcoxy, les groupes aryle à substitution vinyle, et les groupes aryle à substitution alcynyle.
  11. Composition de revêtement selon l'une quelconque des revendications 1 à 10, dans laquelle la charpente du polymère est choisie parmi les polyamides, les polyesters, les polyuréthanes, les polysiloxanes, les résines phénoliques, les polyarylméthylènes, les polystyrènes, les poly(esters acrylates), les poly(acides acryliques), les polyacrylamides, le polyacrylonitrile, les polyéthylènes, les polybutadiènes, les poly(esters de vinyle), le poly(alcool vinylique), les poly(acétals de vinyle), les poly(éthers de vinyle), la polyvinylpyrrolidone, la polyvinylpyridine, le poly(chlorure de vinyle), les poly(oxydes d'éthylène), les poly(oxydes de propylène), les polyéthylèneglycols, les polypropylèneglycols, les poly(éthylène-imines), les résines époxy, les résines phénoxy, le polytétrahydrofurane, la polycaprolactone, le poly(acide styrènesulfonique), les gélatines, les alkylcelluloses, les hydroxyalkylcellulose, les carboxyméthylcelluloses, les amidons et les polysaccharides.
  12. Composition de revêtement selon l'une quelconque des revendications 1 à 11, dans laquelle des substituants de solubilisation ou de dispersion sont attachés à la charpente dudit polymère ; lesdits substituants de solubilisation ou de dispersion étant choisis parmi les acides alkyl- et arylcarboxyliques ; les acides sulfoniques ; les acides phosphoniques ; les phénols, et leurs sels ; et les alkyl- et aryl-amines, ainsi que leurs sels quaternaires.
  13. Composition de revêtement selon l'une quelconque des revendications 1 à 11, dans laquelle des segments de solubilisation ou de dispersion sont attachés de façon covalente à la charpente dudit polymère, lesdits segments de solubilisation ou de dispersion dérivant de monomères solubles dans l'eau.
  14. Composition de revêtement selon la revendication 13, dans laquelle ledit polymère est soluble ou dispersible dans l'eau.
  15. Composition de revêtement selon la revendication 14, dans laquelle lesdits segments de solubilisation ou de dispersion dérivent de monomères choisis dans l'ensemble constitué par l'oxyde d'éthylène, la vinylpyrrolidone, l'alcool vinylique, l'acrylamide, les éthers de vinyle, et l'éthylèneimine.
  16. Composition selon l'une quelconque des revendications 1 à 15, dans laquelle audit polymère est lié de façon covalente au moins un groupe insaturé pendant capable de subir une polymérisation radicalaire.
  17. Composition de revêtement selon la revendication 16, dans laquelle ledit groupe insaturé pendant au nombre d'au moins un est choisi parmi les groupes acrylate, les groupes méthacrylate et les groupes acrylamide.
  18. Composition selon l'une quelconque des revendications 1 à 17, dans laquelle audit polymère est lié de façon covalente au moins un groupe éther de vinyle pendant qui réagit par polymérisation induite par un acide.
  19. Composition selon l'une quelconque des revendications 1 à 18, qui contient aussi au moins un composé polymérisable insaturé capable de subir une polymérisation radicalaire.
  20. Composition selon la revendication 19, dans laquelle le composé polymérisable est capable de subir une polymérisation par addition, radicalaire et à propagation de chaíne.
  21. Elément photosensible comprenant un support sur lequel est déposé un revêtement dérivant de la composition selon l'une quelconque des revendications précédentes et rendu insoluble par irradiation avec un rayonnement actinique.
EP91300706A 1990-02-07 1991-01-30 Composition de revêtement photoréticulable et photoinsolubilisable contenant des groupes halométhyle-1,3,5-triazine Expired - Lifetime EP0441524B1 (fr)

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